Causes of Psoas Hematoma in Dialysis and Heart Failure Patients
In a dialysis patient with heart failure, psoas hematoma is most commonly caused by anticoagulation therapy (including heparin used during hemodialysis sessions), followed by dialysis catheter-related vascular injury, and the inherent bleeding diathesis of uremia itself.
Primary Causative Factors
1. Anticoagulation-Related Bleeding
The most frequent cause is therapeutic anticoagulation, which is particularly relevant in this population for multiple reasons 1, 2, 3:
- Oral anticoagulants for atrial fibrillation (highly prevalent in both CKD and heart failure patients) 4
- Heparin administration during hemodialysis sessions 4
- Antiplatelet agents often used concurrently for cardiovascular disease 4
The combination of these agents creates a compounded bleeding risk that is poorly characterized in dialysis populations 4. Mortality from psoas hematoma in dialysis patients on oral anticoagulants reaches 81% 5, making this a critical consideration.
2. Dialysis Catheter-Related Vascular Injury
Iatrogenic vascular perforation during central venous catheterization is an underrecognized but serious cause 6:
- Iliac vein perforation can occur during dialysis catheter placement
- The catheter can extend into the psoas muscle, causing massive retroperitoneal hematoma
- This can progress to hemorrhagic shock 6
3. Uremic Bleeding Diathesis
CKD creates a paradoxical coagulation state 4, 7:
- Platelet dysfunction from uremic toxins causes bleeding tendency
- Endothelial dysfunction simultaneously creates a prothrombotic state
- This dual pathology is present even without anticoagulation
4. Heart Failure-Specific Considerations
In patients with advanced heart failure, particularly those with LVADs 7:
- Increased infection risk requiring anticoagulation adjustments
- Hemodynamic instability during dialysis sessions
- Higher bleeding risk from continuous-flow devices
- Frequent need for multiple anticoagulant agents
Clinical Presentation Pitfalls
The diagnosis is easily missed because symptoms are non-specific 1:
- Groin or back pain (often attributed to other comorbidities)
- Leg weakness or inability to walk
- Anemia (common baseline in dialysis patients)
- Hemodynamic instability (attributed to heart failure or dialysis-related hypotension)
In elderly patients with cognitive impairment, obtaining reliable history is compromised, further delaying diagnosis 1.
Diagnostic Approach
CT scan of abdomen/pelvis is the diagnostic test of choice and should be performed urgently when psoas hematoma is suspected 1, 2. Do not delay imaging while pursuing other diagnoses in a dialysis patient with unexplained groin pain, leg weakness, or worsening anemia—particularly if on any form of anticoagulation.
Risk Stratification
Highest risk patients include those with 5:
- Atrial fibrillation (90% mortality if NSDH occurs)
- Oral anticoagulant use pre-dialysis (81% mortality)
- Multiple concurrent anticoagulant/antiplatelet agents
- Recent dialysis catheter placement 6
The 30-day mortality from retroperitoneal hematoma without trauma is 10% in general populations 2, but substantially higher in dialysis patients with the above risk factors.